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path: root/drivers/acpi/dock.c
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Diffstat (limited to 'drivers/acpi/dock.c')
-rw-r--r--drivers/acpi/dock.c382
1 files changed, 297 insertions, 85 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 7d2edf143f1..913bb1e89dd 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -48,7 +48,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
" before undocking");
static struct atomic_notifier_head dock_notifier_list;
-static struct platform_device *dock_device;
static char dock_device_name[] = "dock";
static const struct acpi_device_id dock_device_ids[] = {
@@ -65,23 +64,29 @@ struct dock_station {
struct mutex hp_lock;
struct list_head dependent_devices;
struct list_head hotplug_devices;
+
+ struct list_head sibiling;
+ struct platform_device *dock_device;
};
+static LIST_HEAD(dock_stations);
+static int dock_station_count;
struct dock_dependent_device {
struct list_head list;
struct list_head hotplug_list;
acpi_handle handle;
- acpi_notify_handler handler;
+ struct acpi_dock_ops *ops;
void *context;
};
#define DOCK_DOCKING 0x00000001
#define DOCK_UNDOCKING 0x00000002
+#define DOCK_IS_DOCK 0x00000010
+#define DOCK_IS_ATA 0x00000020
+#define DOCK_IS_BAT 0x00000040
#define DOCK_EVENT 3
#define UNDOCK_EVENT 2
-static struct dock_station *dock_station;
-
/*****************************************************************************
* Dock Dependent device functions *
*****************************************************************************/
@@ -199,6 +204,60 @@ static int is_dock(acpi_handle handle)
return 1;
}
+static int is_ejectable(acpi_handle handle)
+{
+ acpi_status status;
+ acpi_handle tmp;
+
+ status = acpi_get_handle(handle, "_EJ0", &tmp);
+ if (ACPI_FAILURE(status))
+ return 0;
+ return 1;
+}
+
+static int is_ata(acpi_handle handle)
+{
+ acpi_handle tmp;
+
+ if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
+ return 1;
+
+ return 0;
+}
+
+static int is_battery(acpi_handle handle)
+{
+ struct acpi_device_info *info;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ int ret = 1;
+
+ if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer)))
+ return 0;
+ info = buffer.pointer;
+ if (!(info->valid & ACPI_VALID_HID))
+ ret = 0;
+ else
+ ret = !strcmp("PNP0C0A", info->hardware_id.value);
+
+ kfree(buffer.pointer);
+ return ret;
+}
+
+static int is_ejectable_bay(acpi_handle handle)
+{
+ acpi_handle phandle;
+ if (!is_ejectable(handle))
+ return 0;
+ if (is_battery(handle) || is_ata(handle))
+ return 1;
+ if (!acpi_get_parent(handle, &phandle) && is_ata(phandle))
+ return 1;
+ return 0;
+}
+
/**
* is_dock_device - see if a device is on a dock station
* @handle: acpi handle of the device
@@ -209,11 +268,17 @@ static int is_dock(acpi_handle handle)
*/
int is_dock_device(acpi_handle handle)
{
- if (!dock_station)
+ struct dock_station *dock_station;
+
+ if (!dock_station_count)
return 0;
- if (is_dock(handle) || find_dock_dependent_device(dock_station, handle))
+ if (is_dock(handle))
return 1;
+ list_for_each_entry(dock_station, &dock_stations, sibiling) {
+ if (find_dock_dependent_device(dock_station, handle))
+ return 1;
+ }
return 0;
}
@@ -320,8 +385,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
* First call driver specific hotplug functions
*/
list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) {
- if (dd->handler)
- dd->handler(dd->handle, event, dd->context);
+ if (dd->ops && dd->ops->handler)
+ dd->ops->handler(dd->handle, event, dd->context);
}
/*
@@ -341,9 +406,10 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
static void dock_event(struct dock_station *ds, u32 event, int num)
{
- struct device *dev = &dock_device->dev;
+ struct device *dev = &ds->dock_device->dev;
char event_string[13];
char *envp[] = { event_string, NULL };
+ struct dock_dependent_device *dd;
if (num == UNDOCK_EVENT)
sprintf(event_string, "EVENT=undock");
@@ -354,7 +420,14 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
* Indicate that the status of the dock station has
* changed.
*/
- kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+ if (num == DOCK_EVENT)
+ kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
+
+ list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
+ if (dd->ops && dd->ops->uevent)
+ dd->ops->uevent(dd->handle, event, dd->context);
+ if (num != DOCK_EVENT)
+ kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
}
/**
@@ -414,9 +487,10 @@ static void handle_dock(struct dock_station *ds, int dock)
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = dock;
status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer);
- if (ACPI_FAILURE(status))
- printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n",
- (char *)name_buffer.pointer);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
+ ACPI_EXCEPTION((AE_INFO, status, "%s - failed to execute"
+ " _DCK\n", (char *)name_buffer.pointer));
+
kfree(buffer.pointer);
kfree(name_buffer.pointer);
}
@@ -452,6 +526,25 @@ static inline void complete_undock(struct dock_station *ds)
ds->flags &= ~(DOCK_UNDOCKING);
}
+static void dock_lock(struct dock_station *ds, int lock)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = !!lock;
+ status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ if (lock)
+ printk(KERN_WARNING PREFIX "Locking device failed\n");
+ else
+ printk(KERN_WARNING PREFIX "Unlocking device failed\n");
+ }
+}
+
/**
* dock_in_progress - see if we are in the middle of handling a dock event
* @ds: the dock station
@@ -479,7 +572,7 @@ static int dock_in_progress(struct dock_station *ds)
*/
int register_dock_notifier(struct notifier_block *nb)
{
- if (!dock_station)
+ if (!dock_station_count)
return -ENODEV;
return atomic_notifier_chain_register(&dock_notifier_list, nb);
@@ -493,7 +586,7 @@ EXPORT_SYMBOL_GPL(register_dock_notifier);
*/
void unregister_dock_notifier(struct notifier_block *nb)
{
- if (!dock_station)
+ if (!dock_station_count)
return;
atomic_notifier_chain_unregister(&dock_notifier_list, nb);
@@ -504,7 +597,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
/**
* register_hotplug_dock_device - register a hotplug function
* @handle: the handle of the device
- * @handler: the acpi_notifier_handler to call after docking
+ * @ops: handlers to call after docking
* @context: device specific data
*
* If a driver would like to perform a hotplug operation after a dock
@@ -512,27 +605,36 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
* the dock driver after _DCK is executed.
*/
int
-register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler,
+register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
void *context)
{
struct dock_dependent_device *dd;
+ struct dock_station *dock_station;
+ int ret = -EINVAL;
- if (!dock_station)
+ if (!dock_station_count)
return -ENODEV;
/*
* make sure this handle is for a device dependent on the dock,
* this would include the dock station itself
*/
- dd = find_dock_dependent_device(dock_station, handle);
- if (dd) {
- dd->handler = handler;
- dd->context = context;
- dock_add_hotplug_device(dock_station, dd);
- return 0;
+ list_for_each_entry(dock_station, &dock_stations, sibiling) {
+ /*
+ * An ATA bay can be in a dock and itself can be ejected
+ * seperately, so there are two 'dock stations' which need the
+ * ops
+ */
+ dd = find_dock_dependent_device(dock_station, handle);
+ if (dd) {
+ dd->ops = ops;
+ dd->context = context;
+ dock_add_hotplug_device(dock_station, dd);
+ ret = 0;
+ }
}
- return -EINVAL;
+ return ret;
}
EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
@@ -544,13 +646,16 @@ EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
void unregister_hotplug_dock_device(acpi_handle handle)
{
struct dock_dependent_device *dd;
+ struct dock_station *dock_station;
- if (!dock_station)
+ if (!dock_station_count)
return;
- dd = find_dock_dependent_device(dock_station, handle);
- if (dd)
- dock_del_hotplug_device(dock_station, dd);
+ list_for_each_entry(dock_station, &dock_stations, sibiling) {
+ dd = find_dock_dependent_device(dock_station, handle);
+ if (dd)
+ dock_del_hotplug_device(dock_station, dd);
+ }
}
EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
@@ -575,13 +680,9 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
*/
dock_event(ds, event, UNDOCK_EVENT);
- if (!dock_present(ds)) {
- complete_undock(ds);
- return -ENODEV;
- }
-
hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
undock(ds);
+ dock_lock(ds, 0);
eject_dock(ds);
if (dock_present(ds)) {
printk(KERN_ERR PREFIX "Unable to undock!\n");
@@ -604,14 +705,36 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
static void dock_notify(acpi_handle handle, u32 event, void *data)
{
struct dock_station *ds = data;
+ struct acpi_device *tmp;
+ int surprise_removal = 0;
+
+ /*
+ * According to acpi spec 3.0a, if a DEVICE_CHECK notification
+ * is sent and _DCK is present, it is assumed to mean an undock
+ * request.
+ */
+ if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK)
+ event = ACPI_NOTIFY_EJECT_REQUEST;
+ /*
+ * dock station: BUS_CHECK - docked or surprise removal
+ * DEVICE_CHECK - undocked
+ * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal
+ *
+ * To simplify event handling, dock dependent device handler always
+ * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
+ * ACPI_NOTIFY_EJECT_REQUEST for removal
+ */
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
- if (!dock_in_progress(ds) && dock_present(ds)) {
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle,
+ &tmp)) {
begin_dock(ds);
dock(ds);
if (!dock_present(ds)) {
printk(KERN_ERR PREFIX "Unable to dock!\n");
+ complete_dock(ds);
break;
}
atomic_notifier_call_chain(&dock_notifier_list,
@@ -619,20 +742,19 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
hotplug_dock_devices(ds, event);
complete_dock(ds);
dock_event(ds, event, DOCK_EVENT);
+ dock_lock(ds, 1);
+ break;
}
- break;
- case ACPI_NOTIFY_DEVICE_CHECK:
- /*
- * According to acpi spec 3.0a, if a DEVICE_CHECK notification
- * is sent and _DCK is present, it is assumed to mean an
- * undock request. This notify routine will only be called
- * for objects defining _DCK, so we will fall through to eject
- * request here. However, we will pass an eject request through
- * to the driver who wish to hotplug.
- */
+ if (dock_present(ds) || dock_in_progress(ds))
+ break;
+ /* This is a surprise removal */
+ surprise_removal = 1;
+ event = ACPI_NOTIFY_EJECT_REQUEST;
+ /* Fall back */
case ACPI_NOTIFY_EJECT_REQUEST:
begin_undock(ds);
- if (immediate_undock)
+ if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
+ || surprise_removal)
handle_eject_request(ds, event);
else
dock_event(ds, event, UNDOCK_EVENT);
@@ -642,6 +764,51 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
}
}
+struct dock_data {
+ acpi_handle handle;
+ unsigned long event;
+ struct dock_station *ds;
+};
+
+static void acpi_dock_deferred_cb(void *context)
+{
+ struct dock_data *data = (struct dock_data *)context;
+
+ dock_notify(data->handle, data->event, data->ds);
+ kfree(data);
+}
+
+static int acpi_dock_notifier_call(struct notifier_block *this,
+ unsigned long event, void *data)
+{
+ struct dock_station *dock_station;
+ acpi_handle handle = (acpi_handle)data;
+
+ if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK
+ && event != ACPI_NOTIFY_EJECT_REQUEST)
+ return 0;
+ list_for_each_entry(dock_station, &dock_stations, sibiling) {
+ if (dock_station->handle == handle) {
+ struct dock_data *dock_data;
+
+ dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL);
+ if (!dock_data)
+ return 0;
+ dock_data->handle = handle;
+ dock_data->event = event;
+ dock_data->ds = dock_station;
+ acpi_os_hotplug_execute(acpi_dock_deferred_cb,
+ dock_data);
+ return 0 ;
+ }
+ }
+ return 0;
+}
+
+static struct notifier_block dock_acpi_notifier = {
+ .notifier_call = acpi_dock_notifier_call,
+};
+
/**
* find_dock_devices - find devices on the dock station
* @handle: the handle of the device we are examining
@@ -688,6 +855,8 @@ fdd_out:
static ssize_t show_docked(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct dock_station *dock_station = *((struct dock_station **)
+ dev->platform_data);
return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station));
}
@@ -699,6 +868,8 @@ static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL);
static ssize_t show_flags(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct dock_station *dock_station = *((struct dock_station **)
+ dev->platform_data);
return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags);
}
@@ -711,6 +882,8 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
+ struct dock_station *dock_station = *((struct dock_station **)
+ dev->platform_data);
if (!count)
return -EINVAL;
@@ -728,6 +901,8 @@ static ssize_t show_dock_uid(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned long lbuf;
+ struct dock_station *dock_station = *((struct dock_station **)
+ dev->platform_data);
acpi_status status = acpi_evaluate_integer(dock_station->handle,
"_UID", NULL, &lbuf);
if (ACPI_FAILURE(status))
@@ -737,6 +912,26 @@ static ssize_t show_dock_uid(struct device *dev,
}
static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
+static ssize_t show_dock_type(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dock_station *dock_station = *((struct dock_station **)
+ dev->platform_data);
+ char *type;
+
+ if (dock_station->flags & DOCK_IS_DOCK)
+ type = "dock_station";
+ else if (dock_station->flags & DOCK_IS_ATA)
+ type = "ata_bay";
+ else if (dock_station->flags & DOCK_IS_BAT)
+ type = "battery_bay";
+ else
+ type = "unknown";
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", type);
+}
+static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
+
/**
* dock_add - add a new dock station
* @handle: the dock station handle
@@ -747,8 +942,9 @@ static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
static int dock_add(acpi_handle handle)
{
int ret;
- acpi_status status;
struct dock_dependent_device *dd;
+ struct dock_station *dock_station;
+ struct platform_device *dock_device;
/* allocate & initialize the dock_station private data */
dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL);
@@ -758,22 +954,34 @@ static int dock_add(acpi_handle handle)
dock_station->last_dock_time = jiffies - HZ;
INIT_LIST_HEAD(&dock_station->dependent_devices);
INIT_LIST_HEAD(&dock_station->hotplug_devices);
+ INIT_LIST_HEAD(&dock_station->sibiling);
spin_lock_init(&dock_station->dd_lock);
mutex_init(&dock_station->hp_lock);
ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
/* initialize platform device stuff */
- dock_device =
- platform_device_register_simple(dock_device_name, 0, NULL, 0);
+ dock_station->dock_device =
+ platform_device_register_simple(dock_device_name,
+ dock_station_count, NULL, 0);
+ dock_device = dock_station->dock_device;
if (IS_ERR(dock_device)) {
kfree(dock_station);
dock_station = NULL;
return PTR_ERR(dock_device);
}
+ platform_device_add_data(dock_device, &dock_station,
+ sizeof(struct dock_station *));
/* we want the dock device to send uevents */
dock_device->dev.uevent_suppress = 0;
+ if (is_dock(handle))
+ dock_station->flags |= DOCK_IS_DOCK;
+ if (is_ata(handle))
+ dock_station->flags |= DOCK_IS_ATA;
+ if (is_battery(handle))
+ dock_station->flags |= DOCK_IS_BAT;
+
ret = device_create_file(&dock_device->dev, &dev_attr_docked);
if (ret) {
printk("Error %d adding sysfs file\n", ret);
@@ -812,6 +1020,9 @@ static int dock_add(acpi_handle handle)
dock_station = NULL;
return ret;
}
+ ret = device_create_file(&dock_device->dev, &dev_attr_type);
+ if (ret)
+ printk(KERN_ERR"Error %d adding sysfs file\n", ret);
/* Find dependent devices */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
@@ -828,24 +1039,12 @@ static int dock_add(acpi_handle handle)
}
add_dock_dependent_device(dock_station, dd);
- /* register for dock events */
- status = acpi_install_notify_handler(dock_station->handle,
- ACPI_SYSTEM_NOTIFY,
- dock_notify, dock_station);
-
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Error installing notify handler\n");
- ret = -ENODEV;
- goto dock_add_err;
- }
-
- printk(KERN_INFO PREFIX "%s\n", ACPI_DOCK_DRIVER_DESCRIPTION);
-
+ dock_station_count++;
+ list_add(&dock_station->sibiling, &dock_stations);
return 0;
-dock_add_err:
- kfree(dd);
dock_add_err_unregister:
+ device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
@@ -859,12 +1058,12 @@ dock_add_err_unregister:
/**
* dock_remove - free up resources related to the dock station
*/
-static int dock_remove(void)
+static int dock_remove(struct dock_station *dock_station)
{
struct dock_dependent_device *dd, *tmp;
- acpi_status status;
+ struct platform_device *dock_device = dock_station->dock_device;
- if (!dock_station)
+ if (!dock_station_count)
return 0;
/* remove dependent devices */
@@ -872,14 +1071,8 @@ static int dock_remove(void)
list)
kfree(dd);
- /* remove dock notify handler */
- status = acpi_remove_notify_handler(dock_station->handle,
- ACPI_SYSTEM_NOTIFY,
- dock_notify);
- if (ACPI_FAILURE(status))
- printk(KERN_ERR "Error removing notify handler\n");
-
/* cleanup sysfs */
+ device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
@@ -904,41 +1097,60 @@ static int dock_remove(void)
static acpi_status
find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
{
- int *count = context;
acpi_status status = AE_OK;
if (is_dock(handle)) {
if (dock_add(handle) >= 0) {
- (*count)++;
status = AE_CTRL_TERMINATE;
}
}
return status;
}
-static int __init dock_init(void)
+static acpi_status
+find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
{
- int num = 0;
-
- dock_station = NULL;
+ /* If bay is a dock, it's already handled */
+ if (is_ejectable_bay(handle) && !is_dock(handle))
+ dock_add(handle);
+ return AE_OK;
+}
+static int __init dock_init(void)
+{
if (acpi_disabled)
return 0;
/* look for a dock station */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, find_dock, &num, NULL);
+ ACPI_UINT32_MAX, find_dock, NULL, NULL);
- if (!num)
- printk(KERN_INFO "No dock devices found.\n");
+ /* look for bay */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, find_bay, NULL, NULL);
+ if (!dock_station_count) {
+ printk(KERN_INFO PREFIX "No dock devices found.\n");
+ return 0;
+ }
+ register_acpi_bus_notifier(&dock_acpi_notifier);
+ printk(KERN_INFO PREFIX "%s: %d docks/bays found\n",
+ ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);
return 0;
}
static void __exit dock_exit(void)
{
- dock_remove();
+ struct dock_station *dock_station;
+
+ unregister_acpi_bus_notifier(&dock_acpi_notifier);
+ list_for_each_entry(dock_station, &dock_stations, sibiling)
+ dock_remove(dock_station);
}
-postcore_initcall(dock_init);
+/*
+ * Must be called before drivers of devices in dock, otherwise we can't know
+ * which devices are in a dock
+ */
+subsys_initcall(dock_init);
module_exit(dock_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 10:27:30 +0000